Government bond
What is Government bond?
A government bond is debt issued by a national government, with repayment supported by that government's legal and financial capacity under the bond's terms.
Why governments issue bonds
Governments borrow to finance budgets, infrastructure, refinancing, and liquidity management. Securities can be bills, notes, conventional bonds, floating-rate notes, or inflation-linked obligations. Market depth and credit quality vary widely. Debt issued in a government's own currency has a different risk profile from foreign-currency debt that requires access to another currency for repayment.
Sources of return and risk
Return comes from coupon income, price change, roll, and currency movement for foreign investors. Risks include interest rates, inflation, fiscal sustainability, currency depreciation, liquidity, political intervention, and default or restructuring. Even a bond treated as low-default-risk can have high duration and suffer a large mark-to-market loss when yields rise.
Example
A ten-year nominal government bond may be used as a reference rate for corporate pricing. If its yield rises from 3% to 4%, its price falls according to duration and convexity. A foreign investor's result also reflects the exchange rate. Holding to maturity does not protect purchasing power from inflation or remove sovereign credit risk.
How to interpret it
Identify issuer, currency, governing law, maturity, inflation linkage, and the exact government support. Do not assume all government-related entities carry the same guarantee. Compare nominal and real yields, curve position, fiscal and external balances, central-bank regime, and market liquidity. For global portfolios, separate local bond return from currency return.
Limitations
The phrase risk-free is model shorthand, not a claim that every government bond is free of loss. Default, restructuring, capital controls, inflation, and currency depreciation have occurred historically. Official yield curves may use modeled par or constant-maturity rates rather than executable prices. Tax and regulatory treatment can also influence yields.
Practical checklist
Verify the legal obligor and currency, map cash flows, measure key-rate duration and convexity, and test inflation and currency shocks. Review auction, settlement, repo, and liquidity conventions. Distinguish nominal, real, par, spot, and forward rates. Match the selected government reference to the bond or liability being analyzed rather than using one sovereign curve universally.
Also known as: sovereign bond
Sources and further reading
- Bonds: Frequently Asked Questions, Investor.gov, U.S. Securities and Exchange Commission
- Treasury Yield Curve Methodology, U.S. Department of the Treasury